| 两个C#动态编译代码的例子 |
| ［ 作者：佚名 转贴自：网络转载 阅读次数：34 更新时间：2007-8-27 11:39:00 录入：刘光勇 ］ |
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动态生成代码程序收集NO1：
using System;
using System.Collections.Generic;
using System.Reflection;
using System.Text;
using System.CodeDom;
using System.CodeDom.Compiler;
namespace csrepl {
class Program {
static string funcprefix = "using System; "
+ "public delegate void Proc(); "
+ "public class Wrapper { "
+ " public static object Set(string name, object value) { "
+ " AppDomain.CurrentDomain.SetData(name, value); "
+ " return value; "
+ " } "
+ " public static object Get(string name) { "
+ " return AppDomain.CurrentDomain.GetData(name); "
+ " } "
+ " public static object Invoke(Proc proc) { "
+ " proc(); "
+ " return null; "
+ " } "
+ " public static object Eval() { return ";
static string funcsuffix = "; } }";
static string StringEval(string expr) {
string program = funcprefix + expr + funcsuffix;
ICodeCompiler compiler = CodeDomProvider.CreateProvider("C#").CreateCompiler();
CompilerParameters cp = new CompilerParameters();
cp.GenerateExecutable = false;
cp.GenerateInMemory = true;
CompilerResults results = compiler.CompileAssemblyFromSource(cp, program);
if (results.Errors.HasErrors) {
if (results.Errors[0].ErrorNumber == "CS0029")
return StringEval("Invoke(delegate { " + expr + "; })");
return results.Errors[0].ErrorText;
}
else {
Assembly assm = results.CompiledAssembly;
Type target = assm.GetType("Wrapper");
MethodInfo method = target.GetMethod("Eval");
object result = method.Invoke(null, null);
return result == null ? null : result.ToString();
}
}
static void Main(string[] args) {
while (true ) {
Console.Write("> ");
Console.Out.Flush();
string expr = Console.ReadLine();
if (expr == null)
break;
try {
string result = StringEval(expr);
Console.WriteLine(result);
}
catch (TargetInvocationException ex) {
Console.WriteLine(ex.InnerException.GetType().Name + ": " + ex.InnerException.Message);
}
catch (Exception ex) {
Console.WriteLine(ex.GetType().Name + ": " + ex.Message);
}
}
}
}
}
代码2：
private void Compiler(string code)
{
CompilerParameters vCompilerParameters = new CompilerParameters();
vCompilerParameters.GenerateExecutable = false;
vCompilerParameters.GenerateInMemory = true;
vCompilerParameters.ReferencedAssemblies.Add("System.Windows.Forms.dll");
string vSource =
"using System.Windows.Forms;\n" +
"public class Temp\n" +
"{\n" +
" public void Test()\n" +
" {\n" +
" " + code + "\n" +
" }\n" +
"}\n";
CompilerResults vCompilerResults =
CodeDomProvider.CreateProvider("CSharp").CompileAssemblyFromSource(vCompilerParameters, vSource);
Assembly vAssembly = vCompilerResults.CompiledAssembly;
object vTemp = vAssembly.CreateInstance("Temp");
MethodInfo vTest = vTemp.GetType().GetMethod("Test");
vTest.Invoke(vTemp, null);
}
string code = "int sum = 0;\nfor(int i = 0; i < 100; i++)\n{\nsum += i;\n}\nMessageBox.Show(sum.ToString());";
Compiler(code);
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